﻿(112.) 



T Rl'TICUM* *. 



Linnean Class and Order. Tria'ndriaI-. Digy'nia. 



Natural Order. Grami'neac, Juss. Gen. PI. p. 28. — Sm. Gr. 

 of Bot. p. 68. — Lindl. Syn. p. 293 ; Introd. to Nat. Syst. of But. 

 p. 292. — Loud. Hort. Brit. p. 542. — Gra'mina, Linn. — Rich, by 

 Macgill. p. 393. — Sm. Engl. FI. v. i. p. 71. — Gramina'les; sect. 

 Triticin.® ; type, Hordea'ce.e, Burnett’s Outl. of Bot. pp. 359 

 and 362. 



Gen. Char. Common Receptacle f rachis J elongated, toothed 

 alternately on each side, compressed, wavy. Spikelets (fig. 1.) soli- 

 tary at each tooth, lateral, contrary to the main stalk, many- 

 flowered. Calyx (fig. 2.) of 2 concave, oblong, ribbed or keeled, 

 nearly equal, opposite glumes , with or without terminal awns. 

 Florets 3 or more in each spikelet, 2-ranked, applied laterally to 

 the rachis. Corolla (fig. 3.) of 2, spear-shaped palea, outer palea 

 resembling the calyx, concave, keeled or furrowed, pointed or awn- 

 ed ; inner palea flat, awnless, inflexed on each side at the lateral 

 rib. Nectary (fig. 5.) of 2 pointed scales, tumid at the base. Fila- 

 ments (see fig. 3.) 3, hair-like. Anthers (see fig. 3.) strap-shaped, 

 forked at each end. Germen (fig. 4.) turbinate. Styles (fig. 4.) 2, 

 short, distinct. Stigmas (see fig. 4.) feathery. Seed egg-shaped, 

 blunt, with a narrow channel along the upper side, loose, but en- 

 veloped in the unchanged corolla. 



Distinguished from other genera, with aggregate florets on a 

 jointed or toothed rachis, with lateral excavations, in the same class 

 and order, by a solitary, many-seeded calyx of 2 transverse oppo- 

 site glumes. 



Five species British. 



TRI'TICUM RE'PENS. Creeping Wheat-grass. Couch-grass. 

 Squitch. 



Spec. Char. Glumes pointed or awned, spear-shaped, many- 

 ribbed. Florets about 5, sharp-pointed or awned. Leaves flat. 

 Root creeping. 



Engl. Bot. t. 909. — Knapp. Gr. Brit. t. 111. — Host. Gram. Aust. v. ii. p. 17. 

 t. 21. — Schreb. Beschr. der Graser, t. 26. — Graves’ Brit. Grasses, t. 130. — Linn. 

 Sp. PI. p. 128. — Huds FI. Angl. (2nd ed.) p. 57. — Sm. FI. Brit. v. i. p. 158. 

 Engl. Fi. v. i. p. 182. — With. (7th ed.) v. ii. p. 205. — Hook. Brit. FI. p. 54. — 

 Mart. FI. Rust. t. 124. — Leers’ FI. Herb. (2nd ed ) p. 44. t. 12. f. 3. — Lightf. FI. 

 Scot. v. i. p. 109. — Sibth. FI. Oxon. p. 52.— Abbot’s FI. Bedf. p. 27. — Purt. 

 Midi. FI. v. i. p. 89. — Relh. FI. Cant. (3rd ed.) p. 51. — Sincl. Hort. Gram. 

 Woburn, p. 27. f. 25. — Hook. FI. Scot. p. 44. — Grev. FI. Edin. p. 31. — FI. Dev. 

 pp. 22 &c 125. — Johnst. FI. Berw. v. i. p. 31. — Curt. Brit. Entomol. v. 7. t. 309. — 



Fig. 1. A Spikelet, (rather larger than nature). — Fig. 2. Calyx. — Fig. 3. A 

 Floret, shewing the 2 Paleae, the 3 Stamens, and the 2 Pistils. — Fig. 4. Germen 

 and Pistils. — Fig. 5. The Nectary. — Fig. 6. The upper part of the Sheath and 

 the base of the Leaves, to show (in the broadest part of the legume) the short 

 stipula. 



* So called because it is tritum, beaten, or thrashed, as corn, out of the ear. 

 Dr. Withering. 



t See •Alopeeurus pratensis, fol. 45, note f. 



